Abstract

ABSTRACT The actuation properties of free standing films of poly-3,4-ethylenedioxythiophene (PEDOT) prepared from propylene carbonate (PC) solutions of tetrabutylammonium trifluromethanesulfonate have been studied in a range of aqueous and organic (PC) solvent electrolytes. The following electrolyte salts were investigated: TBACF 3 SO 3 , LiCF 3 SO 3 , TBAPF 6 , NaPF 6 , NaDBS and TMACl. The best actuation performance was achieved in TMACl (aq.) with >4 % strain, 0.18 % s -1 strain rate and a low creep of 2.3 % af ter 50 cycles using potential step expe riments. The PEDOT film morphology was significantly changed from an open sub-micron pore polymer network to a morphology with fewer and less open pores when the solvent was changed from PC to water. Keywords: PEDOT, ECMD, immobilised anions, electrolytes, solvents, cationic actuation 1. INTRODUCTION Among the range of conducting polymers which have been investigated for use as actuators, polypyrrole (PPy) based systems have been the most widely studied. The research and development of actuating elements for applications such as micro-pumps

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